US 2109517 A
Description (OCR text may contain errors)
March 1, 1938. c. P. XENIS 2,109,517
CONNECTER AND METHOD OF APPLYING SAME Filed July 31, 1936 z 15 +2 50 x\\\\\\\\\\\\\ 1 I I 1 2;.
v INVENTOR. Co/vsT/l/v 7"l/V5PXENAS ATTORNEYS Patented I Mar. 1, 1938 UNITED STATES PATENT OFFICE Constantine P. Xenis, Little Neck, N. Y.
Application July 31, 1936, Serial No. 93,596
This invention relates to an improved connecter for joining the ends of conductors or similar parts. The invention also contemplates a novel method of joining such parts.
Heretofore, in the joining of conductors or cables, sleeves have-been fitted to the ends thereof and then subjected toeither a drawing operation or to swaging operations to bring about an intimate engagement of the parts. Such prior practice, in many cases, involves the use of drawing dies, swaging tools, rolling devices, or cartridge actuated compression devices, all of which are relatively expensive and cumbersome in operation. Cableor other conductor connections frequently have to be made under ground in manholes, or in other locations where there are extremely limited working spaces and it is highly desirable to provide a connecter which requires no special tools, or equipment to be carried into such limited spaces.
' connecters consisting of slotted tubular sleeves into which cables are inserted and soldered in place are commonly used in underground work. The high cost of this operation and the objecg5 tionable appearance of solderpots and kerosene furnaces on city streets and the large number of accidents resulting from the use and handling of molten solder are the main objections to this old procedure. 3o Another type of connecter heretofore used is the so-called mechanical type which requires no solder. In this old type radial pressure is obtained by compressing slotted conical wedges. The main objections to this type of connection is 35 its relatively high cost, the fact that the effectiveness of connection depends on the tightening of the parts to an extent which cannot be predetermined, so that the human element is an important factor in its proper installation, and also 40 because the various threaded connections which are depended upon to maintain the necessary pressures may loosen up as the result of vibration.
The advantages of my novel type of connecter 45 in this respect are, namely:
It is less expensive to manufacture, it is easier to apply, predetermined pressures are obtained.
and there is nothing to loosen up.
One object of the present invention is to pro- 50 vide a simplified connecter for wires and cables which can be preconditioned at the factory so that when a joint is to be made in the field no cumbersome or special tools will be required for the distortion of the connecter sleeve. Another 55 object is to provide a connecter which can be readily and inexpensively manufactured and which will yet effectively perform its intended function.
Another object of the invention is to provide an improved method for quickly making conduc- 5 tor or cable connections.
The above and other objects will be apparent from the following detailed disclosure when read in connection with the accompanying drawing and the features of patentable novelty will be 10 pointed out with particularity in the appended claims.
In the drawing-- Fig. 1 illustrates a cable joint made in accordance with and embodying the present in- 15 vention; Fig. 2 is a cross section on line 22 of Fig. 1; Fig. 3-is a view similar to Fig. 1, but showing the manner of connecting two conductors of difierent diameters; Fig. 4 is an end view of my improved connecter; Fig. 5 is a side elevation 20 thereof; Figs. 6 and 7 illustrate steps in the method of preparing the connecter for subsequent use; Fig. 8 is an end view ofthe connecter and its separator ready to be applied to the ends of conductors or cables to be united; Fig. 9 is a side elevation of Fig. 8; Figs. 10 and 11 are views of modified forms of multiple connecters embodying the invention; Fig. 12 is a view showing the application of the invention to a terminal lug such as used in applying to switches, transformers and the like.
Referring in detail to the drawing, I 5 and I 6 represent the contiguous ends of cables or other conductors to be united. According to my invention, such cables or connecters are united by a sleeve-like connecter l1 formed of suitable metal possessing sufllcient inherent resiliency so that when the bore 18 is expanded and then allowed to resume its normal diameter, the walls of the connecter will forcibly grip the conductor ends. The bore I8 is formed of a smaller diameter than that of the cable to which it is to be applied, hence the cable can only be inserted after the connecter is expanded. The difl'erence between the initial diameter of the bore and the diameter of the cable determines the magnitude of pressure which will be maintained between the contacting surfaces thereof. The tubular connecter is preferably, though not necessarily so formed that the bore I8 is eccentric to the outer cylindrical sur- 5 face 'of the connecter tube. However, tubular forms other than circular may be employed. However, it is regarded by me as an advantage to have the portion I9 of the connecter wall relatively thicker than the portion diametrically z I opposite thereto. Buch diametrically opposite portion is provided with a longitudinally extending slot 20 which opens into the bore It. The advantage of having the bore eccentric to the outer surface of the tubular connecter, is that such an arrangement permits a greater expansion of the connecter without sacrificing the strength thereof. v In order to precondition the connecter for subsequent use in the field, it may be expanded at the factory by inserting in the bore a mandrel 2|, such as indicated in Fig. 1, which is provided with tapered ends 22. While the connecter is in this expanded condition, a separator 23 is inserted in the slot. The mandrel is then removed. This results in the production of the article of manufacture, illustrated in Figs. 8 and 9, comprising the expanded connecter sleeve with the sepa"- rator It assembled therewith.
This separator is preferably provided with suitable means for engagement with a tool, such as a screw driver or the like to facilitate the eventual removal of the separator, as illustrated in Fig. 8, where an overhanding. projection of the lug 24 is provided. However, a slot or niche could be provided for a similar purpose.
In some cases, I contemplate not expanding the connecter atthe factory, but furnishing it to the user in an unexpanded condition. In such case, a simple device used in the field may be used to expand the connecter by forcing apart the portions thereof adjacent the slot and then inserting the cables. Thereupon, the connecter can be released so as to allow it to grip-the cables. An expansion device similar to a clamp for engagement with the slot will suffice for such a practice.
With my improved connecter, such as shown in Figs. 8 and 9, it will be readily apparent that, in order to make a cable joint, it is merely necessary to insert the ends I! and I! of the conductors into the bore of the connecter and then to remove the separator by prying the same with a screw driver or by knocking it out with any suitable tool. Upon removal of the separator, the inherent resiliency of the metal will cause the connecter to firmly grip the contiguous wires and practice shows that a joint of satisfactory electrical conductivity is thus secured. The firm grip made by the inherent resiliency of my connecter effects a substantially permanent joint as distinguished from readily separable connections which are usually adapted to be made and broken by hand operation. Mechanical means are necessary for expanding my connecter as distinguished from the prior art devices in which the connections are adapted to be made and broken by hand operation. The connecter may be made of various metals, but I regard bronze as one-of the most desirable materials. However, other materials such as copper, or strong I aluminum alloys or spring steel may be used.
The connecter is adapted for use in joining copper or aluminum cables and in fact may be used for joining non-conducting parts as well.
In the modification-shown, in Fig. 3, the con-- necter I1 is provided with two eccentric bores I! and ll for engagement with cables of different diameters. Figs. 10 and -11 show the application of the invention to multiple connecters ll and |'I=, Fig; 10 being adapted for joining two pairs of conductors. In the modification of Fig.
11, I show parallel connecter portions W and I1 adapted to be connected with the ends of a pair 7 of parallel conductors and I1 represents a connecter portion by means of which a tap may be taken of! from the conductors which are co nected by the portions Il and I1.
In the modification of Fig. 12, I have shown a connecter portion I'l having a slot 20' therein. This connecter is provided with a terminal lug II apertured at 26 forengagement with a suitable bolt or other fastening devices for attachment to switches, transformers, bus bars or other electric equipme t. While the connecter described is pec ly well suited for the joining of cables or conductors, it is apparent that the principle of first expanding the tubular member and holding it in the expanded position by a removable separator and then allowing it to contract is adapted to the connecting of rods or suitable bus bars together and also to the connecting of other elements, such as pipe railings and the like. a
While I have described quite precisely the steps in the method of making cable conductor connections and the specific features of the preferred embodiments of the connecter illustrated, it is not to be construed that I am limited thereto since various modifications and substitutions of equivalents may be made by those skilled in the art without departure from the invention as defined in the appended claims. 1
What I claim is:
- 1. As an article of manufacture, a cable connecter comprising a tubular body of resilient metal with a pre-expanded longitudinal bore to receive the cable ends to be joined, said body having a longitudinal slot therein opening into the bore, and a separator in said slot adapted to be removed after the insertion in the bore of a part to be joined.
- 2. As an article of manufacture, a conductor connecter comprising a tubular body of resilient metal with an eccentric pre-expanded longitudinal bore toreceive the ends of conductors to be joined, said body having a longitudinal slot therein opening into the bore and a separator in said slot holding the connecter expanded and adapted to be removed after the insertion in said bore of said conductor ends.
" 3. As an article of manufacture, a cable connecter comprising a body of metal of relatively high resiliency having a-longitudinal bore, a longitudinal slot in the body opening into said bore,
. a separator in said slot, said separator having a shoulder portion for engagement with a suitable tool to facilitate its removal from the slot.
4. As an article of manufacture, a cable connecter comprising a body of metal of relatively high resiliency having a longitudinal bore, a longitudinal slot in the body opening into said bore. a separator in said slot, said separator having an overhanging projection for engagement with suitable tool to facilitate its removal from the slot.
5. As an article of manufacture, a cable connecter comprising a body of metal of relatively high resiliency having a plurality of longitudinally extending bores therein each adapted to receiveends of conductors to be joined, respective slots in said body extending longitudinally of and body being longitudinally slotted through to the bore to facilitate expansion thereof for initial engagement with said ends and a separator assembled with said body eil'ective to hold the bore expanded to a size to permit free insertion of the cable ends and adapted to be removed after such insertion whereby the inherent resiliency of the metal body will serve to so forcibly grip said cable ends as to make a substantially permanent connection of high electrical conductivity.
7. As an article of manufacture, a connecter comprising a body of resilient metal with a bore therein adapted to forcibly grip the ends of parts to be joined, said body being longitudinally slotted through to the bore. the wall portion of said body being thickest in the zone opposite the slotted portion and gradually decreasing in thickness toward said slotted portion and a separator assembled in said slotted portion to facilitate free insertion oi the conductor ends in said bore.
8: As an article of manufacture, a connecter comprising a tubular spring metal body having an eccentric bore therein to receive and forcibly grip the ends of parts to be joined, said body being longitudinally slotted through to the bore at a zone substantially opposite the thickest wall portion thereof and a separator assembled in said slotted portion to facilitate free insertion of the conductor ends in said bore.
9. The method of joining conductors which comprises providing a split metal connecter sleeve with a bore of slightly smaller diameter than the ends of the conductors to be joined, expanding the sleeve and inserting a separator to hold it in expanded condition, inserting the ends of the conductors in the expanded sleeve, then removing said separator thus permitting the sleeve to contract and firmly grip the conductor ends.
10. The method of joining conductors which comprises providing a longitudinally split connecter sleeve of resilient metal having an eccentric bore therein, expanding said sleeve and inserting a separator in the splitportion thereof, inserting the ends of the conductors in said bore, then removing the separator to permit the sleeve to contract and thus firmly grip the conductor ends.
CONS'I'AN'I'INE P m3.